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Lack of sleep can make you angrier!

Lack of sleep can make you angrier!

New Delhi, Nov 29 (ANI): According to a study, not getting enough sleep makes you angrier, especially in frustrating situations. The Iowa State University research has been published in the Journal of Experimental Psychology: General. “Other studies have shown a link between sleep and anger, but questions remained about whether sleep loss was to blame or if anger was responsible for disrupted sleep,” said Zlatan Krizan, professor of psychology at Iowa State. The research answers those questions and provides new insight on our ability to adjust to irritating conditions when tired. Study participants were randomly split into two groups: one maintained their normal sleep routine and the second restricted their sleep by two to four hours each night for two nights. Those who maintained averaged almost seven hours of sleep a night, while the restricted group got about four and a half hours each night. The difference reflects sleep loss we regularly experience in everyday life, Krizan said. To measure anger, Krizan and Garrett Hisler, an ISU doctoral student in psychology, had participants come to the lab – before and after the sleep manipulation – to rate different products while listening to brown noise (similar to the sound of spraying water) or more aversive white noise (similar to a static signal). Krizan says the purpose was to create uncomfortable conditions, which tend to provoke anger. “In general, anger was substantially higher for those who were sleep restricted,” Krizan said. “We manipulated how annoying the noise was during the task and as expected, people reported more anger when the noise was more unpleasant. When sleep was restricted, people reported even more anger, regardless of the noise.” It is well established that sleep loss increases negative emotions, such as anxiety and sadness, and decreases positive emotions, such as happiness and enthusiasm, Krizan said. He and Hisler measured these effects to more generally understand the relationship between sleep, anger and emotions. Krizan says they found sleep loss to uniquely impact anger, and not just result from feeling more negative in that moment. The researchers also tested whether subjective sleepiness explained more intense feelings of anger. Sleepiness accounted for 50 percent of the experimental effect of sleep restriction on anger, suggesting individuals’ sense of sleepiness may point to whether they are likely to become angered, Krizan said.

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